I have an inboard 90hp mercury jet sport engine and need help tunning the carbs. I just purchased this boat and when I took it out to the lake it would hit 35mph with 2 people in it, when putting 4 people including myself it would drop down to like 10mph. I don't think the engine is running as strong as it should. Is the boat suppose to do that. I did not max out the weight or come close. I have read that this engine in a 15ft boat is suppose to go around 35-40 with no problems. Also when turning the boat it seems to almost come to a stop. Can someone help me out with these problems and help me understand why it is doing this. Thanks for all your help.
